Replace "good commit" message in CONTRIBUTING.md (#58)

Signed-off-by: Prakriti <prakritibansal98@gmail.com>

CONTRIBUTING.md

@@ -48,7 +48,14 @@ Once we've discussed your changes and you've got your code ready, make sure
 that everything builds and tests are passing using PowerShell (`.\build.ps1`) or Visual Studio and open your PR. Your pull request is most likely to be accepted if it:
 
 * Includes tests for new functionality.
-* Has a [good commit message](http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html).
+* Has a [good commit message](https://chris.beams.io/posts/git-commit/):
+    * Separate subject from body with a blank line
+    * Limit the subject line to 50 characters
+    * Capitalize the subject line
+    * Do not end the subject line with a period
+    * Use the imperative mood in the subject line
+    * Wrap the body at 72 characters
+    * Use the body to explain _what_ and _why_ instead of _how_
 * Each commit must be signed by the author ([see below](#sign-your-work)).
 
 ## License
@@ -116,4 +123,4 @@ If you want this to be automatic you can set up some aliases:
 ```
 git config --add alias.amend "commit -s --amend"
 git config --add alias.c "commit -s"
-```
+```